Kartläggning och potential av restvärme i Halmstad kommun

Excess heat is a term used for heat losses that unutilised goes to the surroundings, but which to acertain degree can be used for other purposes. Since knowledge for the use and extent of potentialexcess heat in Halmstad municipality is limited, the County Administrative Board of Halland wants toinvestigate this further. The purpose is to show how the existing excess heat resources potentially canbe used instead of being cooled off to the surroundings. This could contribute to a more sustainableenergy system. The goal is to do this by mapping the excess heat within Halmstad municipality, andto show what advantages and challenges there are in recovering excess heat from a system andsustainability perspective. Empirical data have been collected from environmental reports, a webbased survey, and interviews to achieve this goal. The results show that there is plenty of excess heat that can be utilized in Halmstad municipality, butfew companies take advantage of this. The survey indicates that low-temperature excess heatconstitutes the largest share and that this part in greater extent is unused. Today, low-quality heatneeds to be upgraded to be used, which pose an obstacle. If the temperatures for heat use and heatdistribution are lowered, the need for the upgrade may be reduced. The conclusions of this study are that information about companies energy use needs to be moreeasily accessible to facilitate the work with energy efficiency and the use of excess heat. This canadvantageously be included as an annual report, similar to the environmental reports, but with a morecomplete structure, where the risks of misconceptions are minimized. Another conclusion is thatsupport, in the form of knowledge, about energy recovery needs to be provided for this to beimplemented to a greater extent.